Mascara is a type of makeup that you put on your eyelashes for a more "flawless" look. There are mascara's that have natural colours like brown and black, and even in more "extreme" colours like blue, white, yellow etc. Eyeliner can be either a "khol-pencil" or a dipliner, which you use to draw lines on your eyelid. I think that's the easiest explanation I can come up with, hope it helped~